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Suihua, China

Liu H.-Y.,Northeast Normal University | Liu H.-Y.,Suihua University | Yang J.,Northeast Normal University | Liu Y.-Y.,Northeast Normal University | Ma J.-F.,Northeast Normal University
Dalton Transactions | Year: 2012

Two novel inorganic-organic hybrid compounds based on octamolybdates, namely, [Cu(H2L)2(γ-Mo8O 26)]·(Mo6O19)·2H2O (1) and [Cu(H2L)(γ-Mo8O26)(H 2O)2]·5H2O (2), where L = 1,1′-(1,5-pentanediyl)bis[2-(4-pyridyl)benzimidazole], have been successfully synthesized at different pH values under hydrothermal conditions. Compound 1, which is hydrothermally prepared at pH ≈ 3.5, exhibits an entirely new type of intercalated layer. The nanosized hexamolybdate anions as guests are introduced into the layers. When the pH value is adjusted to 2, a structurally-different complex 2 was obtained. Compound 2 shows a unique 3D 4-connected framework constructed by inorganic layers and H2L 2+ ligands as bridges. The two compounds were characterized by elemental analyses, IR spectra and TGA. In addition, the electrochemical properties of 1-modified carbon paste electrode (CPE) have also been investigated in 1 M H2SO4 aqueous solution. © 2012 The Royal Society of Chemistry. Source


Liu H.-Y.,Northeast Normal University | Liu H.-Y.,Suihua University | Wu H.,Northeast Normal University | Ma J.-F.,Northeast Normal University | And 3 more authors.
Crystal Growth and Design | Year: 2010

Six coordination polymers based on three related flexible bis-[(pyridyl)-benzimidazole] ligands and different carboxylates, namely, [Zn2(m-BDC)2(L1)]·2H2O (1), [Zn2(p-BDC)2(L1)(H2O)2] (2), [Zn2(m-BDC)2(L2)]·2.25H 2O (3), [Zn2(p-BDC)2(L2)] ·CH3OH (4), [Zn2(m-BDC)2(L 3)]·2H2O (5), and [Zn2(p-BDC) 2(L3)]·2CH3OH (6), where L1 = 1,1′-(1,4-butanediyl)bis[2-(2-pyridyl)benzimidazole], L2 = 1,1′-(1,6-hexanediyl)bis[2-(2-pyridyl)benzimidazole], L3 = 1,1′-(1,10-decanediyl)bis[2-(2-pyridyl)benzimidazole], m-BDC = m-benzenedicarboxylate anion, and p-BDC = p-benzenedicarboxylate anion, have been synthesized under solvothermal conditions. Their structures have been determined by single crystal X-ray diffraction analyses and further characterized by elemental analyses and infrared (IR) spectra. Compound 1 shows a one-dimensional (1D) double chain which extends into a two-dimensional (2D) supramolecular sheet by π-π interactions. Polymers 2-4 display similar 2D layer structures with 3-connected 63 topologies. In 2 and 3, the adjacent layers are further connected through π-π interactions to form three-dimensional (3D) supramolecular structures. However, in 4, two identical layers penetrate each other in parallel modes to give a 2-fold parallel interpenetrating net. Compounds 5 and 6 show 2-fold interpenetrating networks with α-Po topological structures. A systematic structural comparison of these complexes indicates that the different lengths of the bis-[(pyridyl)- benzimidazole] ligands (L1-L3) are important for the formation of the different structures. In addition, the luminescent properties of L1-L3 and 1-6 have been studied in the solid state at room temperature. © 2010 American Chemical Society. Source


Liu H.-Y.,Northeast Normal University | Liu H.-Y.,Suihua University | Wu H.,Northeast Normal University | Yang J.,Northeast Normal University | And 3 more authors.
Crystal Growth and Design | Year: 2011

Seven polyoxometalate (POM) hybrid materials based on Keggin polyanion building blocks and copper(I)-organic frameworks with pyrazine derivatives, namely, [CuI 4(2Et,3Me-Pyr)5(SiW 12O40)] (1), [CuI 4(2,6-Pyr) 4(SiW12O40)] (2), [CuI 4(2,5-Pyr)4(SiW12O40)(H 2O)2] (3), [CuI 4(2,3,5,6-Pyr) 4(SiW12O40)]-(H2O) (4), [Cu I 4(2,5-Pyr)4(PMoVI 11MoV O40)]·1.5H2O (5), [CuI 3(2,3,5-Pyr)4-(PMo12O 40)]·H2O (6), and [CuI 4(2Et,3Me-Pyr)5(PMoVI 11Mo V O40)] (7), where 2Et,3Me-Pyr = 2-ethyl-3-methylpyrazine, 2,6-Pyr = 2,6-dimethylpyrazine, 2,5-Pyr = 2,5-dimethylpyrazine, 2,3,5-Pyr = 2,3,5-trimethylpyrazine, and 2,3,5,6-Pyr = 2,3,5,6-tetramethylpyrazine, have been synthesized under solvothermal conditions. In 1 and 7, polyanions link CuI-organic sheets to generate 3D (3,4)-connected frameworks. In 2, the polyanion bridges CuI-organic chains to yield a 3D (3,4,6)-connected framework. Both 3 and 4 exhibit 2D double layer structures. In 5, the Keggin polyanion bridges the CuI-Pyr chains to form an infinite 3D (3,4)-connected framework. In 6, CuI cations are bridged by the 2,3,5-Pyr and Keggin polyanions to generate a novel 2D (8,3) sheet. The roles of the pyrazine derivatives and the Keggin polyanions in the formation of the POM-based MOFs have been discussed. © 2011 American Chemical Society. Source


In recent years, the development of efficient artificial photocatalysts for CO2 reduction has attracted much attention; however, the product selectivity, catalyst stability and catalytic activity are far from the requirements for commercial consideration. Herein, we design and synthesis of ZnO nanorod arrays@carbon fiber (ZnO NA@CF) composites via an in situ controlled growth process. The as-prepared (ZnO NA@CF) composites exhibit exceedingly high activity and excellent selectivity in the photocatalytic reduction of CO2 to CH3OH (the maximum CH3OH yield is 430.2μmol gcat.-1 for 3.0h under UV light irradiation, which is 7.15 times as high as that on pure ZnO) as a result of the improved electron-hole pair separation rate on ZnO NA@CF interface, as well as high light harvesting effects derived from the NA@CF hierarchical structure. © 2016. Source


Liu H.-Y.,Northeast Normal University | Liu H.-Y.,Suihua University | Bo L.,Northeast Normal University | Yang J.,Northeast Normal University | And 3 more authors.
Dalton Transactions | Year: 2011

Two novel hybrid materials based on two kinds of octamolybdate anions and metal-organic frameworks (MOFs), namely, [Ag 8(L 1) 4(α-Mo 8O 26)(β-Mo 8O 26)(H 2O) 3]·H 2O (1) and [Cu I 3.1Cu II 0.5(β-Mo 8O 26) 0.5(ζ-Mo 7 VIMo VO 26) 0.5(L 2) 2(H 0.8L 2) 0.5] (2), where L 1 = 1,1′-(1,3-propanediyl)bis[2-(4-pyridyl)benzimidazole] and L 2 = 1,1′-(1,4-butanediyl)bis[2-(3-pyridyl)benzimidazole], have been successfully synthesized. Crystal structure analysis revealed that 1 is a three-dimensional (3D) framework constructed of silver(i)-organic sheets and two types of (Mo 8O 26) 4- isomers. Compound 2 is a rare 3D framework containing copper(i,ii)-organic cages and 1D channels occupied by the (ζ-Mo 7 VIMo VO 26) 5- and (β-Mo 8O 26) 4- anions. The two compounds were characterized by elemental analysis, IR spectroscopy, diffuse reflectivity spectroscopy, and photoluminescent spectroscopy. In addition, the photocatalytic behavior of 1 was investigated. © 2011 The Royal Society of Chemistry. Source

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